Hacksaw and frame therefor.



T. B. WREN.

HACKSAW AND FRAME THEREFOR.

APPLICATION FILED OCT. 28.1914.

THOMAS 3. WEEK, or MAHAYNOY crrr, rnmrsvnvama. I

HAG KSAW AND FRAME THEREFOR. I

mosses.

Specification of Letters Patent.

Application filed October 28, 1914. Serial N o. 869,122.

1 '0 alt'who'm, it may concern Be it known that I, THOMAS B. WnnN, a

citizen of the United States "of America, residing at Mahanoy City, in the county of Schuylkill and State of Pennsylvania, have invented a new and useful Hacksaw and 'Frame Therefor; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a new and useful hack saw and adjustable frame therefor.

An object of the invention is the provision of a frame for a hack saw which may not only be adjusted lengthwise, but laterally as well.

Another object of the invention is the .prov1s1on of means whereby the hack saw blade may be adjusted annually upon its axis, and held in a positive adjustable posi- 80 and combination of parts, as hereinafter set tion.

One of the features of the invention is the strap loops for holding the adjustable parts of the frame alined, said loops being removable.

' In practical fields the details of'construc forth, shown in the drawings and claimed.

in the drawings, Figure 1 is a view in erspective of the improved hack saw and awe constructed in accordance with the invention. Fig. 2 is a sectional view on line 2-2 of Fig. 1, showing the adjustable connections for the blade. Fig. 3 is a sectional view on line 33 of Fig. 1, showing the adjustable connections foradjusting the frame lengthwise. Fig. 4 is a sectional view on line 4--4 of Fig. 1 showing the adjustable connections of the frame whereby it may be adjusted laterally or at right angles to the lengthwise adjustment. v

a I Referring more particularly to the drawings, 1 designates the frame, which. comprises four sections, two angular sections 3 and 4, the parts 5 of which are arranged parallel to one another and held in such wise by the straps 6 and 7. The strap 6 is provided with an aperture 8 to receive one of the lugs 9 of one of the parts 5 to hold the strap againstdisplacement. Thestrap 7 is provided with a thumb screw 10, not only passing throu the strap, buta through one end of one of the parts 5,' so as to engage any one of the depressions 11 of the opposite part 5. However, the thumb screw of the'strap 7 may also be threaded to the aperture 13 of the part 5 carrying the strap 7. Each end of the arm 14 of each of the sections 3 and 4 is provided with a lug 15 passing through an a erture 16 of the strap 17 These straps 1 also receive the third and fourth sections 18 and 19 of the frame. The straps 20 also hold the arms 14 and the third and fourth sections 18 and 19 of the frame together, there being thumb screws 20 passing through the straps 20 and through the sections 18 and 19 so as to engage the depressions 21' of the arms Patented Nov. 28, 1916.

14, whereby the sections 18 and 19 and the arms 14 may be held in a'djusted positions relative to one another.

The ends 22 of the sections 18 and 19 are provided with sleeves 24 and 25 having ears 26 riveted to the sections 18 and 19. The sleeve 24 is provided-with a plug 27, one end of which is provided with a transverse pin 28, the ends of (which are received in any two opposite notches 24 of the sleeve to hold the plug in adjusted positions, there being a pin 29 to hold the plug against being removed. The plug is constructed with a .recess 30 having an angularly disposed stud 31 to enter an aperture of the saw blade. The end wall of the recess 30 over hangs the end of the blade, as shown, thereby necessitating the blade being disposed at an angle to the plug in connection .Wlth the same. The sleeve 25 is likewise constructed with notches 32, any two opposite notches being designed to receive the two pro ections 33 of the plate 33, which has a ug and slot connection 34 with the screw plug 35, on which the handle 36 is threaded, which handle screws against the plate 33 to hold the bulges in said notches, there being a lock nut on the screw plug to hold the screw plug in adjusted positions, the lock nut being designated by the neral 37. e other end of the saw blade is connected to a lug 38 of the screw plug; By loosening the lock nut the handle may be unscrewed thereby loosening, the screw plug It will'be that by the provision of the notches, the blade may be held with its flat surface in a plane parallel with the plane of the frame, or at right angles to the plane of the frame, or at'intermediate angles, such as forty-five degrees, to one side or the other.

In 'a number of instances, in'using a hack saw it has been foundnecessary to adjust the blade with one hand, while holding that which is being operated upon with the other hand and heretofore this could not be accompl-ished, owing to the fact that after adjusting one end of the blade and holding the same in such position, it would necessitate theother hand,"in adjusting the op'posite ends of the blade, in which case the operator would have to leave go with the other 'handthat which is'to be sawed or cut. However, in -the -present case the operator may unsci ew'rthe handle, after which the spring 2'4, is arranged between thepi'n 28 andithe shoulder 24: of the sleeve 24, will force the plug 27 forwardly carrying the saw blade with it and also maintaining the blade substantially between the two plugs and '27. In moving-the plug 27 forwardly the pin 28 is freed from said notches 24. Then by partially rotating the p1ate38 the two plugs and the blade may be siiiiultaneeusly partially rotated or adjusted with the one hand, while holding that which is. to be cut or sawed with the other hand.

The invention having been set forth, what is claimed as new and useful is:-

' In ,im rovements in a hack saw construction, a rame, a saw blade, sleeves mounted on the innerand outer ends of the frame and having corresponding notches in their outer edges, plugs loosely mounted in the said sleeves, one connected to each end of the salw blade, a handle threaded on one of the and ha means 006 eratin' with th adjacent l e e ve whereby 51c plug mayv be adjustedflongitudinally upon its axis, said-means having projections to engage the notches in the edge of the inner sleeve, the plug of the outer sleeve having a transverse pin forfengagement with the notches of the outer sleeve,v and a spring in said outer sleeve interposed" between one end of said outer sleeve and the pin for holding.

the saw blade tautwhile it is being adjusted on its 'am's In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS B. WREN.

Witnesses: l

Jae. L. Mannmon'r, 

